Well, I caught Slimjet saving records of my searches and I couldn't figure out a way to clear it out.
Maybe if I had signed into it, it would have been cleaned by an extension, but it bothered me. It is basically CHROME.
Qupzilla, though, is being turned into the KDE konqueror-replacement. Both did work well for me,
though Slimjet seemed to have a tiny advantage. Still, both are better than some browsers I have
tried in the past. Oh, and now I remember that Qupzilla (in GTK) did crash occasionally, as Paul said. But I think it
is written in QT now, or so I have been told, so it could be improved. Speaking of improved---
I did get a chance to try the new Firefox, and it was nice, but am waiting for more experienced folks
to rate it, before I install.
UPDATE: New Firefox 57 seems really good. And, I found Vivaldi to be a good chrome browser.